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NBT Mathematics: Number Sense and Calculations Flashcards

7 cards from real NBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 NBT Mathematics: Number Sense and Calculations flashcards as text

  1. What is the least common multiple (LCM) of 12 and 18?

    Answer: 36

    The LCM of 12 and 18 is 36, the smallest number divisible by both 12 and 18.

  2. Which of the following is an irrational number?

    Answer: √7

    √7 cannot be expressed as a ratio of two integers since 7 is not a perfect square, making it irrational.

  3. What is the value of (−3)² − (−3)?

    Answer: 12

    (−3)² = 9, and subtracting −3 is the same as adding 3, giving 9 + 3 = 12.

  4. How many factors does 36 have?

    Answer: 9

    The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36, giving a total of 9 factors.

  5. Which of the following values is the greatest?

    Answer: −0.5

    −0.5 is closest to zero among these negative numbers, making it the greatest.

  6. What is the prime factorization of 180?

    Answer: 2² × 3² × 5

    180 = 4 × 9 × 5 = 2² × 3² × 5, which is verified by multiplying back: 4 × 9 × 5 = 180.

  7. If p and q are both prime numbers greater than 2, which statement must always be true?

    Answer: p + q is even

    All primes greater than 2 are odd, and the sum of two odd numbers is always even, so p + q must be even.